There are two issues you need to address. First, you will need to file for divorce. The process varies greatly from state to state. Divorce law is a matter of state law so you would need to consult an attorney in the state where you live.
Second, once divorce papers are filed you need to notify USCIS. You will need to provide information about the pending divorce and request your removal of conditions be treated as a waiver request.
Answered on Mar 28th, 2016 at 5:27 AM